Diff: DhcpClient.h

Revision:

9:a156d3de5647

Child:

11:647d53d146f1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DhcpClient.h	Tue Aug 27 15:01:10 2019 +0000
@@ -0,0 +1,184 @@
+// DHCP Library v0.3 - April 25, 2009
+// Author: Jordan Terrell - blog.jordanterrell.com
+#ifndef Dhcp_h
+#define Dhcp_h
+
+#include "UdpSocket.h"
+#include "IpAddress.h"
+
+/* DHCP state machine. */
+
+#define STATE_DHCP_START        0
+#define STATE_DHCP_DISCOVER     1
+#define STATE_DHCP_REQUEST      2
+#define STATE_DHCP_LEASED       3
+#define STATE_DHCP_REREQUEST    4
+#define STATE_DHCP_RELEASE      5
+
+#define DHCP_FLAGSBROADCAST     0x8000
+
+/* UDP port numbers for DHCP */
+
+#define DHCP_SERVER_PORT        67          /* from server to client */
+
+#define DHCP_CLIENT_PORT        68          /* from client to server */
+
+/* DHCP message OP code */
+
+#define DHCP_BOOTREQUEST        1
+#define DHCP_BOOTREPLY          2
+
+/* DHCP message type */
+
+#define DHCP_DISCOVER           1
+#define DHCP_OFFER              2
+#define DHCP_REQUEST            3
+#define DHCP_DECLINE            4
+#define DHCP_ACK                5
+#define DHCP_NAK                6
+#define DHCP_RELEASE            7
+#define DHCP_INFORM             8
+
+#define DHCP_HTYPE10MB          1
+#define DHCP_HTYPE100MB         2
+
+#define DHCP_HLENETHERNET       6
+#define DHCP_HOPS               0
+#define DHCP_SECS               0
+
+#define MAGIC_COOKIE            0x63825363
+#define MAX_DHCP_OPT            16
+
+#define HOST_NAME               "ENC28J"
+#define DEFAULT_LEASE           (900)   //default lease time in seconds
+
+#define DHCP_CHECK_NONE         (0)
+#define DHCP_CHECK_RENEW_FAIL   (1)
+#define DHCP_CHECK_RENEW_OK     (2)
+#define DHCP_CHECK_REBIND_FAIL  (3)
+#define DHCP_CHECK_REBIND_OK    (4)
+
+enum
+{
+    padOption               = 0,
+    subnetMask              = 1,
+    timerOffset             = 2,
+    routersOnSubnet         = 3,
+    timeServer              = 4,
+    nameServer              = 5,
+    dns                     = 6,
+    logServer               = 7,
+    cookieServer            = 8,
+    lprServer               = 9,
+    impressServer           = 10,
+    resourceLocationServer  = 11,
+    hostName                = 12,
+    bootFileSize            = 13,
+    meritDumpFile           = 14,
+    domainName              = 15,
+    swapServer              = 16,
+    rootPath                = 17,
+    extentionsPath          = 18,
+    IPforwarding            = 19,
+    nonLocalSourceRouting   = 20,
+    policyFilter            = 21,
+    maxDgramReasmSize       = 22,
+    defaultIPTTL            = 23,
+    pathMTUagingTimeout     = 24,
+    pathMTUplateauTable     = 25,
+    ifMTU                   = 26,
+    allSubnetsLocal         = 27,
+    broadcastAddr           = 28,
+    performMaskDiscovery    = 29,
+    maskSupplier            = 30,
+    performRouterDiscovery  = 31,
+    routerSolicitationAddr  = 32,
+    staticRoute             = 33,
+    trailerEncapsulation    = 34,
+    arpCacheTimeout         = 35,
+    ethernetEncapsulation   = 36,
+    tcpDefaultTTL           = 37,
+    tcpKeepaliveInterval    = 38,
+    tcpKeepaliveGarbage     = 39,
+    nisDomainName           = 40,
+    nisServers              = 41,
+    ntpServers              = 42,
+    vendorSpecificInfo      = 43,
+    netBIOSnameServer       = 44,
+    netBIOSdgramDistServer  = 45,
+    netBIOSnodeType         = 46,
+    netBIOSscope            = 47,
+    xFontServer             = 48,
+    xDisplayManager         = 49,
+    dhcpRequestedIPaddr     = 50,
+    dhcpIPaddrLeaseTime     = 51,
+    dhcpOptionOverload      = 52,
+    dhcpMessageType         = 53,
+    dhcpServerIdentifier    = 54,
+    dhcpParamRequest        = 55,
+    dhcpMsg                 = 56,
+    dhcpMaxMsgSize          = 57,
+    dhcpT1value             = 58,
+    dhcpT2value             = 59,
+    dhcpClassIdentifier     = 60,
+    dhcpClientIdentifier    = 61,
+    endOption               = 255
+};
+
+typedef struct _RIP_MSG_FIXED
+{
+    uint8_t     op;
+    uint8_t     htype;
+    uint8_t     hlen;
+    uint8_t     hops;
+    uint32_t    xid;
+    uint16_t    secs;
+    uint16_t    flags;
+    uint8_t     ciaddr[4];
+    uint8_t     yiaddr[4];
+    uint8_t     siaddr[4];
+    uint8_t     giaddr[4];
+    uint8_t     chaddr[6];
+} RIP_MSG_FIXED;
+
+class   DhcpClient
+{
+private:
+    uint32_t    _dhcpInitialTransactionId;
+    uint32_t    _dhcpTransactionId;
+    uint8_t     _dhcpMacAddr[6];
+    uint8_t     _dhcpLocalIp[4];
+    uint8_t     _dhcpSubnetMask[4];
+    uint8_t     _dhcpGatewayIp[4];
+    uint8_t     _dhcpDhcpServerIp[4];
+    uint8_t     _dhcpDnsServerIp[4];
+    uint32_t    _dhcpLeaseTime;
+    uint32_t    _dhcpT1, _dhcpT2;
+    time_t      _renewInSec;
+    time_t      _rebindInSec;
+    time_t      _lastCheck;
+    time_t      _timeout;
+    time_t      _responseTimeout;
+    time_t      _secTimeout;
+    uint8_t     _dhcp_state;
+    UdpSocket   _dhcpUdpSocket;
+
+    int         requestDhcpLease();
+    void        resetDhcpLease();
+    void        presendDhcp();
+    void        sendDhcpMessage(uint8_t, uint16_t);
+    void        printByte(char* , uint8_t);
+
+    uint8_t     parseDhcpResponse(unsigned long responseTimeout, uint32_t& transactionId);
+
+public:
+    IpAddress   getLocalIp();
+    IpAddress   getSubnetMask();
+    IpAddress   getGatewayIp();
+    IpAddress   getDhcpServerIp();
+    IpAddress   getDnsServerIp();
+
+    int         begin(uint8_t* mac, unsigned long timeout = 60, unsigned long responseTimeout = 4);
+    int         checkLease();
+};
+#endif